Release Notes

53.0.1

FTP Protocol
- New: Handle no-reply from FTP server by adding new overload to Execute() (thanks @FanDjango)
- Fix: NetworkStream ReadAsync infinite timeout when server is unresponsive (thanks @Gino1024)
- Fix: Preserve trailing slashes for special servers (thanks @FanDjango)
- New: Add Config.PreserveTrailingSlashCmdList setting (thanks @FanDjango)
- Fix: Improved handling of multiline FTP server responses (thanks @FanDjango and @kowalski-se)
- Fix: GetChecksum() cannot parse FTP server response if the path contains spaces (thanks @FanDjango)
FTP Connection
- New: Implement Config.EncryptAuthenticationOnly (thanks @FanDjango)
- Fix: CCC failure: NotImplementedException (thanks @FanDjango)
- Fix: NOOP command failure does not indicate disconnection (thanks @FanDjango)
- Fix: Make sure a OperationCancelledException is thrown when cancelling a AsyncConnect() (thanks @bruinsg)
Testing
- New: Add fake FTP clients suitable for mocking (FakeAsyncFtpClient and FakeFtpClient)
- Fix: Update XUnit from 2.4.1 to 2.9.3 (thanks @FanDjango)
- Fix: All integration tests fixed for Docker 4.42.0 (thanks @FanDjango)
- Fix: Date parser unit tests (thanks @FanDjango)
- Remove FileZilla Integration Test as there is no pre-made docker image (thanks @FanDjango)
Code cleanup
- Fix: Use Task.Delay instead of Thread.Sleep (thanks @jnyrup)
- Fix: Various syntax cleanups and modernizations (thanks @jnyrup)
- Fix: Do not call CancellationToken.Register with async delegate (thanks @jnyrup)

52.1.0

Connection
- Add SslProtocol and SslCipherSuite properties.
- Set TLS1.1 as obsolete in .NET 7+ targets
- Fix: Crashing host process on FTP socket timeout
Commands
- Fix: Remove language specific checks and improve detection of File Exists check
Reconnection
- Change: Prevent auto connecting the FTP Client when HashAlgorithms is read
- Add: New option FtpSelfConnectMode to control how FTP reconnections are handled
Testing
- Fix incorrect call sequence in FileTransferTests

52.0.0

Time Zones
- New: Time Zone conversion is performed using standard .NET TimeZoneInfo instead of hourly offset values
- New: ClientTimeZone and ServerTimeZone Properties to configure Time Zone conversion
- New: SetClientTimeZone and SetServerTimeZone Utility methods to configure Time Zone conversion
FTP Monitoring
- New: FTP monitors to detect added/updated/deleted files in remote FTP folders and send events to your application accordingly (FtpMonitor, AsyncFtpMonitor, BlockingAsyncFtpMonitor)
- New: FTP monitor event with details on changed files (FtpMonitorEventArgs)
- New: Sample code for BlockingAsyncFtpMonitor
Testing
- Fix: Total rewrite of FileZilla FTP server docker for integration testing (thanks @FanDjango)
- Fix: Updated tests for new TimeZone API
Maintainance
- Change: Allow overriding of download/upload internal methods in FTP client subclasses (DownloadFileInternal and UploadFileInternal)
- Change: Refactor file transfer and file listing utilities into static module classes
- Change: Improve performance of dictionary lookups (thanks @ssg)
- Fix: LogMaskModule throwing exception when UserName is empty (thanks @ssg)
- Fix: Improve AsyncFtpClient dispose logic and cleanup warnings on build (thanks @FanDjango)

51.1.0

Fix: GUI hangs during Dispose of AsyncFtpClient
Fix: Improve Async & GUI cohabitation
Change: Rename FtpCapability.MLSD to MLST to better reflect its behaviour

51.0.0

Connection
- New: Accurate FTP connection status tracking with the help of NoopDaemon (integrated into IsConnected API)
- New: Enum FtpConnectionState to track FTP socket connection state
- Improve: IsConnected: Handle sync/async close situations and remove unwanted Poll calls
- Improve: Detailed logging of Close/Dispose failures for improved error reporting in user logs
- Fix: Regression where multiple sequential connects/disconnects crash the FTP Client
File Listing
- Fix: DrFtpd sends invalid FTP response 550 when folder exists but is empty
File Transfer
- Improve: Upload/Download speed calculation and improve handling of divide by zero errors
- Improve: Upload/Download log message format
- Improve: Improve file transfer performance by using the new AsMemory API for reading/writing data from/to the FTP socket stream in .NET 5+
Core
- Remove: Config.SocketPollInterval setting, because it is no longer used or required
- Improve: Dozens of log messages throughout the internal socket handling subsystem
- Improve: Documentation for GetReply core function
- Fix: Pass missing cancellation token in async Execute API
- Change: Disposing log messages are now Verbose instead of Warning
- Fix: Uncatchable exceptions after cancellation of read in FtpSocketStream

50.1.0

File Upload
- New: FtpRemoteExists.OverwriteInPlace mode which overwrites files without deleting them first
Connection
- New: FtpConfig.PostConnect to enable the init sequence performed immediately after connection
- Fix: Undetected connect timeout in .NET 5+
- Fix: Remove BufferedStream feature and further refactoring of Dispose logic
- Fix: Use correct SSL stream AuthenticateAsClient API rather than outdated API
- Fix: Mask the FTP server host IP in PASV response when Config.LogHost is set to false
File Transfer
- Fix DateTimes.ParseFtpDate will consider provided formats when parsing date/time values
File Listing
- Improve: Improved performance for Regex parsing by utilizing Regex caching
- Improve: Improved performance for Stream Read/Write API for .NET Standard 2.1 and newer

50.0.1

Fix: Correct sequencing of FTP stream disposing for .NET Framework
Fix: Extraneous GetReply call in UploadInternal/DownloadInternal

50.0.0

File Verification (thanks DasRaschloch and FanDjango)
- New: All file transfer methods now support size/checksum/date comparison
- New: DownloadDirectory, DownloadFile, DownloadFiles, support new size/checksum/date comparison
- New: UploadDirectory, UploadFile, UploadFiles support new size/checksum/date comparison
- New: FXP TransferDirectory, TransferFile support new size/checksum/date comparison
- New: FtpVerify has new options: Size/Date/Checksum/OnlyChecksum
File Transfer (thanks FanDjango)
- Fix: DownloadFile with Progress throws FtpException
- Fix: Correctly handle internal errors in UploadInternal/DownloadInternal
- Fix: GetFileSize provides invalid file length and transfer fails
FTP Proxy (thanks zhaohuiyingxue)
- Fix: GetListing does not use the proxy with passive FTP
FTP Disconnection (thanks FanDjango)
- New: Indicate creating/disposing sync/async connections in log
- Fix: Disconnection during Connect async needs to be awaited
- Fix: FTP BaseClient is also IAsyncDisposable in addition to IDisposable
- Fix: Disposing a connected AsyncFtpClient throws non-fatal InvalidCastException
- Fix: Cloning a AsyncFtpClient throws non-fatal InvalidCastException
- Change: AsyncFtpClient to change all Close usage to await CloseAsync
- Change: FtpDataStream now supports an async close method
- Change: Use DisposeAsync pattern for AsyncFtpClient
- Change: Call Dispose/DisposeAsync on BufferedStream instead of Flush/FlushAsync
- Fix: Restore call to FtpSslStream for graceful TLS termination
IBM OS/400 (thanks FanDjango)
- Fix: Async server-specific post-connection commands was missing for OS400

49.0.2

NOOP Daemon (thanks FanDjango)
- Fix: Improve NOOP daemon logic
- Fix: More reliable termination
- Fix: Handle NOOP API exceptions
- Fix: Handle NOOP situations in Execute API
- Fix: No need for NOOP commands before a QUIT command
- Fix: Improve GetReply logging and handling for stale data and NOOP reactions
- Fix: If QUIT is stashed and reconnect is pending, defer it.
- Fix: Recognize special commands & responses in all cases
- Fix: Delay NOOP connectivity tests until connection fully established
Connection Status (thanks FanDjango)
- Fix: IsStillConnected: Clean up Connect/DisconnectInternal interface artifacts
- Fix: IsStillConnected: Add log messages
IBM OS/400 (thanks FanDjango)
- Fix: Enhance detection of IBM OS/400 servers
- Fix: Set SITE LISTFMT 1 and SITE NAMEFMT 1 on connect
File Transfer
- Fix: DownloadFile: FileCount Progress updated even when files are skipped (thanks J0nathan550)
- Fix: DownloadFile: stopPosition not working in some cases (thanks alexgubanow)
- Fix: DownloadFile: Progress calculation not correct when using stopPosition (thanks alexgubanow)

49.0.1

Fix: Change semaphore logic to prevent deadlock in NOOP Daemon (thanks FanDjango)

49.0.0

NOOP Daemon (thanks FanDjango)
- New: Revised NOOP handling with new config option Noop to enable NOOP daemon
- New: New config options NoopInactiveCommands and NoopActiveCommands to set FTP commands usable
- New: New config option NoopTestConnectivity to issue NOOP commands before every FTP command
- Change: NoopInterval now has a default of 3 minutes
- Change: Update GetReply for new NOOP handling logic
Connection Status (thanks FanDjango)
- New: IsStillConnected() API to reliably check if FTP connection is still active
Auto Connection (mostly thanks FanDjango)
- New: Treat timeouts during AutoDetect as failed detection instead of aborting (thanks FabBadDog)
- Fix: Prevent Auto-Reconnect occurring before connect is complete
- Fix: AutoDetect is thread unsafe, fix AutoDetectConfig IncludeImplicit logic
Multi-Threading (thanks FanDjango)
- Change: Remove all internal locking in the sync FtpClient
FTP Transfers (thanks FanDjango)
- Fix: Servers with no server handler used wrong GetListing() command
- Fix: OpenRead retry attempt fails due to typo
- Fix: Missing code in async stale data handler
- Fix: Missing code in Async DisableUTF8 API
FTP Proxies
- Fix: Correctly set supported method in SOCKS 5 proxy negotiation (thanks rmja)
Codebase Maintainance (mostly thanks FanDjango)
- Fix: Remove NET50_OR_LATER invalid moniker (thanks sean-bloch)
- Fix: Cleanup and standardize all .NET Target framework markers (TFMs)
- Fix: Clean up interfaces and implementation for Connect/Disconnect
Testing (thanks FanDjango)
- Fix: Powershell folder was not being populated, add to GIT ignore list
- Fix: Docker build process was failing due to debian py image changes
Logging (thanks FanDjango)
- New: Log selected server handler, if any are detected
- New: Log improvements for OpenAppend, OpenRead and OpenWrite to help in debugging

48.0.3

Utilities
- New: FtpResult.ToStatus() API to easily compare result values of DownloadFile/DownloadFiles and UploadFile/UploadFiles
File Transfer (thanks FanDjango)
- Fix: Code cleanup for FTP path and directory handling
- Fix: CreateDirectory sometimes needed in AutoNavigate mode
- Fix: Optimize CWD/PWD directory navigation in AutoNavigate mode
- Fix: Prevent infinite loop on stale data read when FTP socket stalled
- Fix: Some FTP servers throw 450 error for empty folders

48.0.1

Directory Navigation (thanks FanDjango)
- New: Add auto-navigate support to GetCheckSum
- Fix: UploadDirectory with FtpNavigate.Conditional does not auto-navigate correctly
- Fix: Not all linux ftp servers support backslash as path separator character
- Fix: Cancellation token passing and await syntax for DownloadFile, UploadFile, GetListing

48.0.0

Directory Navigation
- New: Navigate Config setting to automatically handle FTP directory navigation
- New: Download and Upload API honors Navigate setting
- New: GetListing API honors Navigate setting
File Transfer (thanks FanDjango)
- New: DownloadUriBytes API method to directly connect and download a URI/URL
- Fix: OpenRead, OpenWrite and OpenAppend quirks to handle their stale data
- Fix: Complete redesign of FTP socket stale data handling and CheckStaleData implementation
Auto Connection (thanks FanDjango)
- New: Overloaded API AutoDetect with object-driven configuration using FtpAutoDetectConfig
- New: Add options RequireEncryption and IncludeImplicit to AutoDetect to allow for more configurability during auto-connection
- Fix: Improve AutoDetect behaviour to support various server use-cases
- Fix: Add RNFM/RNTO FTP commands to critical-sequence list to fix Auto-Reconnect of SSL sessions
- Fix: AutoDetect empty config is gracefully handled
Logging
- New: Function Logging method to support logging objects
- Fix: Logging strings creation conditional on it being at all in use (thanks jnyrup)
- Fix: Improve logging of FTP socket stale data (thanks FanDjango)

47.0.0

Logging (thanks FanDjango)
- New: Add exact .NET platform build target during the version logging
File Transfer
- New: Config API LocalFileShareOption to allow setting file sharing mode for uploads
- New: Connection type PASVUSE aka PassiveAllowUnroutable
- New: Add friendlier names for connection types AutoActive and PassiveExtended
File Hashing (thanks FanDjango)
- Fix: Parse non-standard FTP hashes for BrickFTP, Files.com, ExaVault.com
FTP Connections (thanks FanDjango)
- Fix: SSL Buffering: Improve connection logic, update comments, refactor code
- Fix: SSL Buffering: Cannot connect to FTPS IIS server on Windows 2019 from Azure Functions V4
- Fix: Disconnection: Improve conditional compiles and test for each target in FtpSslStream
- Fix: Disconnection: Use ShutDownAsync for .NET 4.7 and later
- Fix: InnerException does not get caught during FTPS security exception
- Fix: Remove dead code in SSL permanent failure detection
- Fix: Custom Stream: PolicyErrors not being set correctly
File Listing (thanks FanDjango)
- Fix: Improve file name parsing logic for DOS/Windows/IIS servers
- Fix: Improved null checks for InfoMessages (thanks jnyrup)
Testing (thanks FanDjango)
- Fix: GnuTlsStream integration tests due to invalid stream detection

46.0.2

Fix: Custom stream logging tweak: Message first then close stream
Fix: Custom stream: Also log InnerException if it exists within the exception
Fix: Internal stream null check to avoid exception in Execute API methods

46.0.1

Fix: Hotfix to remove new DowloadStream overload that causes compile failure

46.0.0

New: Add stopPosition parameter to DownloadBytes and DowloadStream to allow partial downloads

45.2.0

New: Add 9 missing properties to the FTP client interfaces
New: Improve log message wording for EPSV & proxies (thanks FanDjango)
Fix: Improve GetReply to handle connection loss edge cases and timeout exceptions, possibly incurring cpu-loops (thanks FanDjango)
Fix: Improve NOOP behavior to correctly handle timeout exceptions (thanks FanDjango)

45.1.0

New: DiscoverSslSessionLength API to auto compute a working value for SSL Session length (thanks FanDjango)

45.0.4

API: Rename ExecuteGetText to ExecuteDownloadText
Fix: AsyncFtpClient.CreateDirectory fails on freshly created client instance (thanks FanDjango)

45.0.2

New: ExecuteGetText API to execute an FTP command and return multiline output (thanks FanDjango)
New: Integration with FluentFTP.GnuTLS NuGet package to allow for GnuTLS TLS 1.3 streams

44.0.1

File Transfer
- New: UploadFiles API in AsyncFtpClient which takes an IEnumerable<FileInfo>
- New: UploadFiles and DownloadFiles now support rules which allow filtering of uploaded/downloaded files
- New: UploadFiles and DownloadFiles now return a List<FtpResult> with per-file status rather than just a count
- New: FtpMissingObjectException thrown when trying to download a non-existant object
- New: Download API DownloadDirectory, DownloadFile, DownloadBytes, DownloadStream will throw FtpMissingObjectException rather than silently failing
- New: Download API DownloadFiles will mark non-existant files as IsFailed and add the Exception rather than silently failing
- Tests: New integration tests to check fail conditions of Download API
- Fix: Correctly detect non-existant files and folders on FileZillla server (thanks FanDjango)
Connection
- New: Improve reconnect logic to restore working directory and ASCII/Binary data type on automatic reconnection (thanks FanDjango)
- New: Improve Execute logic to handle working directory on automatic reconnection (thanks FanDjango)
- New: Do not attempt Reconnect if we have never been connected before (thanks FanDjango)
- Change: Reconnect logging messages elevated from Info to Warn (thanks FanDjango)
- Fix: Use ConnectAsync for net472 platform where required (thanks jnyrup)
Exceptions
- Change: Move all exception types into the FluentFTP.Exceptions namespace
- New: Separate the log message from the exception in the handler (thanks jnyrup)
- New: Add support for printing exception messages on a newline for socket exceptions (thanks FanDjango)
Logging
- New: Setting Config.LogDurations to configure if durations are to be logged
- New: Add FTP command roundtrip duration to every Response log message (thanks FanDjango)
- New: Smart rendering of log message durations (hours, minutes, seconds, MS)
- Fix: Improve exception handling for connection/disconnection and authentication (thanks FanDjango)
- Fix: Simplify exception handling using when keyword and new conditional keywords (thanks jnyrup)
Quality
- Fix: Reduce library warnings by improving code patterns used (thanks FanDjango)
- Fix: Reduce test warnings by improving code patterns used (thanks FanDjango)

43.0.0

Please read the Migration Guide for help migrating to the new version!
Packaging (thanks jnyrup)
- Core FluentFTP package has removed the dependency on MELA (Microsoft.Extensions.Logging.Abstractions)
- New FluentFTP.Logging package released that integrates with MELA
Logging (thanks jnyrup)
- FtpClient.Logger is no longer a MELA ILogger
- FtpClient.Logger is now a custom interface called IFtpLogger

42.2.0

Connection (thanks FanDjango)
- New: Save bandwidth on automatic reconnection by skipping FEAT command
- Fix: Implementation of connection/disconnection internal logic
- Fix: Create a default ValidateCertificate handler if none is provided
- Fix: Auto-reconnect SSL streams after a set number of replies are read
File Transfer (thanks FanDjango)
- New: Upload: Ability to upload file streams with unknown size
- Fix: Upload: Timeout detection for file streams with unknown size
File Listings (thanks FanDjango)
- New: SetModifiedTime falls back to MDTM if MFMT command not available
- New: GetListing: Catch control connection loss and retry once
- Fix: GetListing silently fails and returns empty array if connection lost
- Fix: IBM OS/400: Correctly handle special chars on EBCDIC code page fault
Tests (thanks FanDjango)
- New: Docker: Add optional path to allow the user to save disk space
- Fix: Fix many XML compiler warnings in the testing system

42.1.0

FTP (thanks FanDjango)
- New: Detect Apache FTP Server (allows for future server-specific handling)
- New: Major improvements to automatic FTP reconnection on connection loss
- New: Special handling to prevent automatic FTP reconnection during critical FTP sequences
- New: Config.SslSessionLength setting to perform automatic reconnection to bypass SSL issues
- Fix: Connect closing has been removed from ReadStaleData and moved into Execute
- Fix: Improved NOOP handling by detecting more formats of NOOP FTP replies
- Fix: IOException edge case on FTPS connections after a certain number of FTP commands
- Fix: Handle early 226 Transfer complete edge case in FTP file download
- Fix: Honor FtpRemoteExists.NoCheck mode in MoveFile to prevent checking for existing files
Tests (thanks FanDjango)
- New: Improved Docker build process using common images to speed up build times
- New: Rewrite all first-party Docker images to use pre-built common images
- New: Support for Apache FTP Server integration test server

42.0.2

FTP (thanks FanDjango)
- New: DNS Caching to prevent DNS server rejecting name resolution for rapidly repeating requests
- New: Better log message for stream dispose to indicate which stream was disposed
- Fix: Typo in FtpException thrown when creating directories
- Fix: Do not assume the server path when CWD command sent
- Change: Refactor post-Execute operations and implement parity in sync/async API
Connection (thanks FanDjango)
- Fix: AutoConnect fails with Azure FTP servers due to profile handling
- Change: Improve exception throwing order for InvalidOperationException if unable to connect
- Change: Complete rewrite of Connect API
- New: Add check to ensure that the IP version is permitted when connecting to servers
- Fix: Implement retry logic to check all possibly server addresses before failing with an exception
- Fix: Implement improved logic to detect timeouts and socket failures
- Fix: ConnectTimeout is not taking effect for ConnectAsync API
- Fix: Reset CurrentDataType when re-connected to an FTP server
File Transfer (thanks FanDjango)
- Fix: Parity in resume logic for upload and download and throw AggregateException where required
- New: Implement the missing ResumeUpload for synchronous API
- New: Add a log message so that the resume operation is actually noticed by users

42.0.1

FTP
- New: TLS authentication failures will always throw AuthenticationException (thanks FanDjango)
- Fix: Improve handling of stale data on socket after GetListing (thanks FanDjango)
Tests
- New: Redesigned Pureftpd integration test server (thanks FanDjango)
Proxies
- Fix: Read extra bytes to fix GetListing for SOCKS4 and SOCKS4a proxies (thanks FanDjango)

42.0.0

Please read the Migration Guide for help migrating to the new version!
API
- New: LastReplies property to fetch a list of the last 5 server replies (thanks FanDjango)
- Removed: Config.DisconnectWithShutdown as it was not required (thanks FanDjango)
- Removed: FtpListOption.NoImage as it was not required (thanks FanDjango)
- Removed: Privatize CurrentDataType and remove ForceSetDataType (thanks FanDjango)
FTP
- New: SslStream wrapper to send TLS close notifications for .NET and .NET Core (thanks FanDjango)
- Change: SSL Closure Alert is now always sent when a stream is terminated (thanks FanDjango)
- Change: Make SSL Shutdown independant of Config.DisconnectWithShutdown (thanks FanDjango)
- Change: GetReply redesign: New mode to exhaustively read all NOOP replies (thanks FanDjango)
Logging
- New: Verbose file sizes logged during file upload/download (thanks FanDjango)
- New: FluentFTP version logged after connection (thanks FanDjango)
- New: GetReply redesign: Verbose logging for NOOP commands (thanks FanDjango)
Z/OS
- New: IBM OS/400: Support blanks in filename and add unit test cases (thanks FanDjango)
Tests
- New: Support for Bftpd integration test server (thanks FanDjango)
- New: Support for ProFTPD integration test server (thanks FanDjango)
- New: Support for glFTPd integration test server (thanks FanDjango)
- New: Support for FileZilla integration test server (thanks FanDjango)
- New: Redesigned VsFTPd integration test server (thanks FanDjango)
- New: Ability to run test server containers as FTP or FTPS servers (thanks FanDjango)
- Fix: Cleanup and improve all Dockerfiles and significantly reduce image size (thanks FanDjango)

41.0.0

Please read the Migration Guide for help migrating to the new version!
API
- New: EmptyDirectory API to delete files but leave top-level directory intact (thanks FanDjango)
FTPS
- Fix: Disable TLS 1.3 as it causes many complex networking issues during data transfer
- Fix: Unified system to handle permanent failures during AutoConnect
- Fix: Throw FtpProtocolUnsupportedException if the FTP server is forcing TLS 1.3 connections
- Fix: Disable SSL Buffering on control connection to improve NOOP handling (thanks FanDjango)
- Fix: Send an additional NOOP command after uploading files to resolve issues (thanks FanDjango)
FTP
- Fix: Log messages pertaining to stale data are improved (thanks FanDjango)
- New: Log the TLS protocol used after making a successful FTPS connection (thanks FanDjango)
- Fix: Correctly forward CancellationToken within DownloadFile, UploadFile, TransferDirectory, DeleteFile, OpenRead, OpenAppend (thanks jnyrup)
- Fix: Optimize SIZE command usage for UploadFile in NoCheck and OverWrite modes (thanks FanDjango)
- Fix: Allow reusing the ActivePorts in FTP Active connection mode (thanks FanDjango)
Z/OS
- New: Add LIST functionality for z/OS JES subsystem (thanks FanDjango)
- New: Switch to using LISTLEVEL 2 in GetListing for more accurate filesizes (thanks FanDjango)
- New: Improve unit test cases for the z/OS file listing parser tests (thanks FanDjango)
Proxies
- New: Support multiple modes of authentication for SOCKS proxies: GSSAPI, UsernamePassword (thanks jnyrup)
- New: Throw MissingMethodException if cannot negotiate an authentication method for SOCKS proxies (thanks jnyrup)

40.0.0

Please read the Migration Guide for help migrating to the new version!
Special thanks to Robin Rodricks, Michael Stiemke and Jonas Nyrup for this release!
Constructor API
- New: 4 new FTP client constructors that accept FTP host, credentials, config and logger
- Remove extraneous constructors because properties can be used instead
Asynchronous API
- New: Split main FTP client classes into FtpClient and AsyncFtpClient
- New: Split main FTP client interfaces into IFtpClient and IAsyncFtpClient
- New: Split common FTP functionality into BaseFtpClient
- New: Drop Async suffix for all async FTP methods in AsyncFtpClient
Config API
- New: Remove all config settings from FtpClient and move it into client.Config object
- New: Dedicated class to hold config settings FtpConfig to cleanup client API
Logging API
- New: Remove client.OnLogEvent and FtpTrace system
- New: Add logger system client.Logger using industry-standard ILogger interface
- New: Add Nuget dependency Microsoft.Extensions.Logging.Abstractions v2.1.0
- Renamed: Legacy logging callback OnLogEvent is now renamed to LegacyLogger
- Renamed: Logging settings: LogIP renamed to LogHost
- Remove logging setting LogFunctions as it is always enabled
FTP Proxies
- New: Split FTP proxy classes into FtpClient*Proxy and AsyncFtpClient*Proxy
- New: FTP proxy classes moved into FluentFTP.Proxy.SyncProxy and FluentFTP.Proxy.AsyncProxy NS
- New: FTP proxy classes with fully async implementations
- Fix: Properly override HandshakeAsync in async FTP proxies (thanks jnyrup)
Organization
- Completely redesign the FTP client code organization and structure
- Update all tests and examples to use the new API and AsyncFtpClient
- Hide all internally-used functions behind the interface IInternalFtpClient
- Code style standardization and use new C# language constructs (thanks jnyrup)
- Add styling rules to .editorconfig to prevent using IDE defaults (thanks jnyrup)
Modernization
- Drop support for .NET Standard 1.2, 1.4 and .NET 2.0, 3.5, 4.0 and 4.5
- Add support for .NET 4.6.2 and 4.7.2
- Remove conditional compilation statements for unsupported platforms
- Remove uncommon static methods FtpClient.Connect and FtpClient.GetPublicIP
- Remove uncommon method DereferenceLink and DereferenceLinkAsync
- Remove uncommon properties QuickTransferLimit, MaximumDereferenceCount, EnableThreadSafeDataConnections, PlainTextEncryption
- Remove uncommon feature FtpListOption.DerefLinks
- Remove obsolete hashing commands GetHashAlgorithm, SetHashAlgorithm, GetHash, etc
- Remove obsolete async pattern using IAsyncResult
- Fix: Forward cancellation token in UploadDirectory and Proxy HandshakeAsync (thanks jnyrup)
- Fix: Parity in sync/async implementations of Authenticate (thanks FanDjango)
- Fix: Improve masking out support for removing sensitive usernames from FTP logs
- Fix: Change all public fields to properties in classes: FtpListParser, FtpClientState, FtpFxpSession, FtpFxpSessionAsync, FtpListItem, FtpProfile, FtpResult
- Fix: Change all public fields to properties in rules: FtpFileExtensionRule, FtpFileNameRegexRule, FtpFileNameRule, FtpFolderNameRegexRule, FtpFolderNameRule, FtpSizeRule
Server support
- Move all IBM zOS logic into the IBMzOSFtpServer server handler (thanks FanDjango)
- Move all OpenVMS logic into the OpenVmsServer server handler (thanks FanDjango)
- Fix: z/OS: Handle z/OS GetListing single line outputs (thanks FanDjango)

39.4.0

New: Add SslProtocolActive property to retrieve the negotiated SSL/TLS protocol version
Fix: z/OS: Improve server handling for absolute path calculation (thanks FanDjango)
Fix: z/OS: Remove direct z/OS dependancy in GetListing (thanks FanDjango)
Fix: z/OS: Add some special cases to handle conversion of remote FTP paths (thanks FanDjango)
Fix: z/OS: Add missing parser tests for z/OS FTP server (thanks FanDjango)
Fix: z/OS: Fix file size calculation for non-unix z/OS files (thanks FanDjango)
Internal: Add integration tests for GetListingAsyncEnumerable (thanks tommysor)
Internal: Remove 3 test dockers that do not work (thanks tommysor)

39.3.0

New: Detect D-Link, TP-LINK, Huawei, MicroTik FTP servers (allows for future server-specific handling)
Fix: AutoConnect now correctly handles internal AggregateException (.NET 5.0+)
Fix: AutoConnect now correctly connects to servers requiring TLS 1.2
Internal: Support automated tests for VsFtpD servers (thanks tommysor)
Internal: Add tests for custom FTP server auto connection

39.2.1

New: Add 5 missing methods into the IFtpClient interface
Fix: z/OS: Inconsistent implementations of GetListing absolute path conversion

39.2.0

New: GetListingAsyncEnumerable method to get file listing using IAsyncEnumerable pattern
New: During AutoConnect, throw FtpProtocolUnsupportedException if newer .NET required
Fix: Support connecting to TLS 1.3 servers using AutoConnect (.NET 5.0+)
Fix: Support automated tests for PureFTP and ProFTP servers (thanks tommysor)

39.1.0

New: Clone method allows for cloning an FtpClient connection with all settings copied
New: InternetProtocol property which returns the current protocol used (IPV4/IPV6)
New: Status property which returns the current FtpClientState flags (advanced use only)
Fix: AutoConnect/AutoConnectAsync now correctly configure Azure FTP servers
Internal: Add integration test system using docker to test FluentFTP against many supported FTP servers
Internal: Refactor server specific, server strings, cloning and auto connection logic into modules

39.0.1

Fix: ConnectAsync correctly honors ConnectTimeout and TimeoutException is correctly thrown
Internal: Add unit tests for Connect/ConnectAsync to ensure ConnectTimeout is honored
Internal: Refactor internal file listing handlers & proxy implementation (API is unchanged)

39.0.0

New: Username/password authentication for SOCKS5 proxy connections
New: Correctly fill in ConnectionType for all proxy types
New: Improved pattern to connect to proxy servers, all details can be specified in FtpProxyProfile
New: Examples for all types of proxies (ConnectProxyHttp11, ConnectProxySocks4, ConnectProxySocks4a, ConnectProxySocks5)
Change: Rename class SocksProxyException to FtpProxyException
Change: Rename class ProxyInfo to FtpProxyProfile and rename members

38.0.0

Change: Rename enum FtpFileSystemObjectType to FtpObjectType
Change: Rename enum FtpFileSystemObjectSubType to FtpObjectSubType
Change: Rename API Upload to UploadBytes and UploadStream instead of overloading
Change: Rename API Download to DownloadBytes and DownloadStream instead of overloading
Change: Logging will always mask host IP, username and password by default (configurable)
New: Throw AggregateException when an error occuring during resuming a file upload (.NET 4.5+)
New: Code generation for parsed file item in order to build accurate unit tests
New: Unit tests for Windows, Unix, OpenVMS, NonStop, IBM, Machine listing parsers
New: Unit tests for Timezone conversion to UTC and to local time
Fix: Improvement to directory parsing for Windows, Unix, OpenVMS, NonStop, Machine listings
Fix: Support parsing of links and Unix-symlinks in Machine listings
Fix: Enable 2 FTP server specific handlers

37.1.2

Fix: Error when downloading large files through SOCKS4 or SOCKS4a proxy (thanks fire-lizard)

37.1.1

Fix: Disable SSL Buffering in .NET 6 as it was in .NET 5

37.1.0

Major: Added support for SOCKS4 proxy servers using the FtpClientSocks4Proxy client class (thanks fire-lizard)
Major: Added support for SOCKS4a proxy servers using the FtpClientSocks4aProxy client class (thanks fire-lizard)

37.0.6

New: Detect Rumpus FTP servers for Mac (allows for future server-specific handling)
New: Detect ABB IDAL FTP servers (allows for future server-specific handling)
New: Add DisconnectWithShutdown property to configure shutdown signal on disconnect
Change: Rename UngracefullDisconnect to DisconnectWithQuit
Fix: Resolve long timeouts after socket stream disconnected

37.0.5

Fix: IOException in synchronous methods when AUTH TLS is rejected (thanks yatlor)

37.0.4

New: Support for .NET 6.0
Fix: For FileZilla FTP Server, TLS socket would be incorrectly closed (thanks michael-hoedl)
Fix: For Windows Server IIS, the space at the beginning of the file name is excluded (thanks tYoshiyuki)

37.0.3

Change: Remove Obsolete from all OpenRead/OpenWrite/OpenAppend API as it is not planned for deletion
Fix: Calculate checksum for files with whitespaces in their name (thanks simonefil)

37.0.2

Fix: z/OS: GetListing: Handle large file sizes reported in Used column (thanks FanDjango)
Fix: z/OS: IsRoot improved to handle Unix realm as well (thanks FanDjango)
Fix: DownloadFile correctly handles connection interruptions and resumes partially downloaded files (thanks FanDjango)

37.0.1

Fix: SetWorkingDirectoryAsync doesn't set working directory due to missing cache invalidation (thanks FanDjango)
Fix: Handle multiline FEAT replies to support ProFTPD capability reporting (thanks FanDjango)
Fix: Correctly disposes CancellationTokenSource created during ConnectAsync (thanks jnyrup)
Fix: Printing of error messages in some ArgumentNullException and ArgumentOutOfRangeException (thanks jnyrup)
Fix: Wrong file parser being selected for servers: NonStop/Tandem, OpenVMS, Windows CE, IIS (thanks jnyrup)
Performance: Improve performance of async methods that return constant values (thanks jnyrup)

37.0.0

New: Detect Titan FTP servers (allows for future server-specific handling)
Fix: Validation of short CRC checksum fails due to mismatch of hex hash format
Change: Remove redundant and extranous OpenRead/OpenWrite/OpenAppend API and keep only 2 methods each
Change: Mark OpenRead/OpenWrite/OpenAppend API as obsolete with warnings and recommend high level API
Change: Cleanup dependencies for netstandard2.0, netstandard2.1 and net5.0 targets (thanks jnyrup)

36.1.0

Change: Restore the older OpenRead API to prevent breaking older projects that depend on it (thanks FanDjango)

36.0.0

New: GetZOSFileSize is now removed and superceeded by GetFileSize which handles z/OS servers
New: Refactor and cleanup z/OS specific logic for: post-connect init, IsRoot, GetFileSize
Change: OpenRead API no longer supports checkIfFileExists argument (thanks FanDjango)
Fix: z/OS & ASCII transfers: Don't get filesize if filesize already known during downloading (thanks FanDjango)
Fix: z/OS UploadFilesAsync: Fixed IBM MVS File uploading path calculation (thanks FanDjango)
Fix: Close underlying FTP socket connection on async cancellation on .NET Core (thanks datvm)
Fix: Correctly handle FTP connection timeout on .NET Core (thanks datvm)
Fix: Enable detection of IBM OS/400 servers that were disabled during server-specific handling

35.2.3

New: Detect PyFtpdLib FTP servers (allows for future server-specific handling)
Fix: Pass CancellationToken to all methods that support cancellation (thanks 0xced)
Fix: Error check on z/OS init commands to ensure they executed correctly (thanks FanDjango)
Fix: Improve FileExists for z/OS: better no SIZE, no MDTM on non HFS files (thanks FanDjango)
Fix: DownloadFile for z/OS: SetDataType directly before the RETR command (thanks FanDjango)
Fix: IsAuthenticated is not updated when calling ConnectAsync (thanks datvm)
Fix: Reduce number of times SetDataType is called internally to improve performance (thanks FanDjango)
Fix: Fail to detect z/OS server if Unix is also mentioned in welcome message (thanks FanDjango)

35.2.2

Fix: z/OS GetFileSize: Ignore SIZE capability even if advertised by server as pointless (thanks FanDjango)
Fix: z/OS DownloadFile: Read to end of stream because filesize is always inaccurate (thanks FanDjango)
Fix: z/OS DownloadFile: Fix check for infinity or NaN progress values (thanks FanDjango)

35.2.1

Fix: z/OS GetListing: Path can be null causing an exception (thanks FanDjango)
Fix: z/OS GetListing: Large files overflow on size calculation resulting in negative file sizes (thanks FanDjango)
Fix: z/OS GetListing: Listing fails unless users CWD to the correct folder of a non-RECFM=U PDS (thanks FanDjango)

35.2.0

New: Support for connecting to FTP/FTPS servers via a SOCKS5 proxy (thanks bjth)
New: Autoconfigure IBM z/OS FTP server using SITE DATASETMODE and QUOTESOVERRIDE (thanks FanDjango)
Fix: GetListing item Fullname is now correctly calculated for Unix and z/OS systems (thanks FanDjango)

35.1.0

New: GetZOSFileSize APIs to get file size of IBM z/OS file system objects (thanks FanDjango)
New: GetZOSListRealm APIs to get realm of IBM z/OS servers (thanks FanDjango)
New: Enhance the z/OS listing parser to get LRECL (via XDSS) on behalf of user (thanks FanDjango)
Fix: AutoConnect detects rejected certificates on connection and raises FtpInvalidCertificateException (thanks FanDjango)
Fix: FtpListOption.ForceList is not being honored by GetListing and machine listings are used instead (thanks FanDjango)
Fix: GetListing regression causing many untrue parse fail warnings (thanks FanDjango)
Fix: GetObjectInfo is overwriting Modified date of a FtpListItem if the consecutive MDTM command fails (thanks Dylan-DutchAndBold)
Fix: reusing same FtpClient should reload server capabilities unless its a cloned connection (thanks FanDjango)
Fix: Executing CWD using Execute API does not invalidate internal CWD cache (thanks FanDjango)

35.0.5

Fix: UploadFile fails to upload in FtpRemoteExists.Resume mode even if stream is seekable

35.0.4

Fix: AutoConnect loads the newly detected FtpProfile to update properties & encryption
Fix: Passive connections work in FtpEncryptionMode.Auto mode and FTPS connection fails

35.0.3

Fix: AutoDetect correctly recommends FtpEncryptionMode.None if FTPS connection failed
Fix: AutoDetect crashes because attempting to read socket type after disconnected

35.0.2

Major: AutoDetect does not cycle through data connection types during connection as it is irrelevant
Major: AutoDetect calculates a data connection type after connection succeeds (EPSV or PASV)

35.0.1

Fix: ConnectAsync now correctly creates a FTP server-specific handler to match Connect behaviour

35.0.0

Automatic connection
- Major: AutoConnect takes far fewer connection attempts due to improvements in connection handling
- Major: AutoConnect and AutoDetect are much faster and smarter and only try each setting once if possible
- Major: AutoDetect only tries Explicit and Implicit FTPS once and then falls back to plaintext FTP
- Major: AutoDetect only tries UTF-8 and never ASCII because most UTF-8 servers don't advertise it
- New: AutoDetect verifies if the server supports UTF-8 and updates the FtpProfile accordingly
- New: FtpProfile code generation adds a warning message if the encoding mode is unverified
- New: AutoConnectAsync now uses true asynchronous connection backed by new AutoDetectAsync
- New: AutoConnect now auto computes an FTP port unless a non-standard port is already set
- New: AutoConnect uses the main FtpClient connection rather than creating one clone per attempt
- Fix: AutoConnect remains connected to the first working profile rather than connecting twice on success
- Fix: AutoConnect reuses the same connection for FTPS and FTP rather than connecting again
- Fix: Ensure FTP server capabilities are loaded during AutoDetect if original connection is blank
- Fix: AutoConnect and AutoDetect will now throw exceptions for permanent failures (bad host/credentials)
- Fix: ConnectAsync now correctly resets the state flags to match Connect behaviour
- Fix: Port now correctly calculates the default port 21 when using FtpEncryptionMode.Auto
Appending and resuming uploads
- Major: The setting FtpLocalExists.Append is now renamed to FtpLocalExists.Resume
- Major: The setting FtpRemoteExists.Append is now renamed to FtpRemoteExists.Resume
- Major: Split FtpRemoteExists.Append into two properties with distinct behaviour (Resume and AddToEnd)
- Major: Improvements to UploadFile and UploadFileAsync to support appending and resuming of uploads
- Major: UploadFile always sets the length of the remote file stream before uploading, appending or resuming
- Major: UploadFile skips uploading in Resume mode if local and remote file are equal length
- Fix: Implementation for resuming uploads using UploadFile based on fixes in UploadFileAsync
Machine listings
- Major: GetListing prefers using Machine Listings over LIST command, unless a custom list parser is set
- Fix: ListingParser property is updated according to auto-detected parser during Connect and ConnectAsync
- Fix: DeleteDirectory and DereferenceLink methods no longer use ForceList and so prefer using Machine Listings
File hashing
- Major: All low-level hash methods are now inaccessible and GetChecksum is the only recommended approach
- Fix: GetChecksum now prints function call logs and sanitizes the input path
- New: GetChecksum switches to the first preferred hash algorithm for HASH command if no algorithm is specified
- New: GetChecksum validates if the required algorithm is unsupported and throws FtpHashUnsupportedException
- New: GetChecksum validates if hashing is unsupported by the server and throws FtpHashUnsupportedException
- Fix: GetChecksumAsync now takes the cancellation token last to follow conventions (argument reorder)
- Fix: Improved extraction of hash checksum when using the HASH command
- Fix: Improved extraction of hash checksum when using the MD5, SHA1, SHA256, SHA512 or X-series commands
- New: SetHashAlgorithm now only modifies the hash algorithm if it has changed
Path sanitization
- Fix: All high level API methods sanitize input paths to improve robustness
- Fix: GetWorkingDirectory always sanitizes the returned working path directory
- Fix: Correctly handle server-specific absolute FTP paths for async operations
- Fix: All function call logs now print the sanitized path rather than raw input path
Path improvements
- Major: GetWorkingDirectory is now extremely fast and caches the working dir path for subsequent calls
- Fix: FileExists supports checking name listings for Windows NT servers which use invalid slashes
- Fix: Root directory FTP paths no longer return ./ and instead return /
Other improvements
- Major: All legacy asynchronous methods using IAsyncResult pattern have been removed (outdated since 2012)
- Fix: FXP file transfers for glFTPd server always try PASV and CPSV commands to get passive port
- Fix: Add logging for skipped files in UploadFile
- Fix: Add file path details in skipped files logged by UploadFile and DownloadFile
- New: GetNameListing to print results of name listing as verbose logs, similar to GetListing
- New: GetFileSize and GetFileSizeAsync to support a configurable return value if the file does not exist
- New: FtpFolderNameRule now supports startSegment to skip checking root directory folder names
- New: FtpFolderNameRegexRule now supports startSegment to skip checking root directory folder names

34.0.2

New: Add support for IsAuthenticated property which enables detection of FTP connection and authentication
Fix: Improved file path calculation when uploading files to IBM zOS running MVS (thanks arafuls)
Fix: Detection of file exists for Windows NT Servers fails due to invalid slashes
Fix: Ensure CompletionCode is always null-checked to fix edge cases and comply with existing implementation
Fix: Possible wrong IP when connecting to Azure FTP Server using EPSV command (thanks jsantos74)

34.0.1

Fix file path calculation when uploading files to IBM zOS running MVS (thanks arafuls)
Detect fully-qualified directory when using data sets on IBM zOS running MVS (thanks arafuls)

34.0.0

Major: Refactor and cleanup helpers & extension methods
Major: Changed namespace of FtpTrace to FluentFTP.Helpers
Major: Changed namespace of FtpListParser to FluentFTP.Helpers
Major: You need to import FluentFTP.Helpers to gain access to FTP extension methods
Major: Changed visibility of various internal FTP helpers to internal to prevent external access
New: Ability to set a local IP address to be used for FTP connections (thanks daviddenis-stx)
New: Properties for local IP: SocketLocalIp, SocketLocalEndPoint, SocketRemoteEndPoint (thanks daviddenis-stx)

33.2.0

New: Ability to block certain server ports from being used during passive FTP connection (PASV/EPSV)
New: PassiveBlockedPorts and PassiveMaxAttempts properties to configure passive blocked ports

33.1.8

Fix: Add support for another server specific string to detect if file exists
Fix: Prevent memory leaks with FTPS on AKS by disabling ValidateCertificateRevocation by default

33.1.7

Fix: DownloadFile should fail if directory path is passed in localPath
Fix: LastReply is not set when using async methods
Fix: Ambiguous call when using LINQ extension methods and EF core
Fix: Remove dependency on System.Linq.Async and disable GetListingAsyncEnumerable

33.1.6

Fix: Use .NET Core API for .NET 5 builds to fix various networking and connectivity issues
New: Support detection of FRITZ!Box FTP servers (allows for server specific commands)

33.1.5

Fix: Do not force users to Connect if capabilities are not loaded (only force if Capabilities are read before connecting)

33.1.4

Fix: Conditionally hard-abort AutoConnect only if the credentials were incorrect

33.1.3

New: LogToFile and LogToConsole are now available on .NET Framework / .NET 5.0
Fix: Capabilities & HashAlgorithms are returned if they are loaded regardless of connection status

33.1.2

Fix: Prevent Capabilities & HashAlgorithms from causing sync-over-async path
Fix: NullReferenceException during UploadFile if the error message is unknown
Fix: If incorrect credentials are passed to AutoConnect, it does not hard abort
Fix: Initializing TLS Authentication hangs in .NET 5 if SslBuffering is enabled

33.1.1

New: Support for .NET 5.0 platform
New: Support for IAsyncEnumerable pattern in .NET Standard 2.0+ and .NET 5.0 (thanks hez2010)
New: Async variant of GetListingAsync introduced: GetListingAsyncEnumerable

33.0.3

Fix: URI ports not being respected when Uri constructor used (thanks julian94)
Fix: Respect 332 Need account for login response during FTP client authorization (thanks novak-as)
Fix: Set default value for restartPosition in Download method to match FtpClient method (thanks AdamLewisGMSL)
Fix: Improved handling for resuming upload when the connection drops (thanks pradu71)

33.0.2

Fix: Honor custom parsers if server-specific handler is used

33.0.1

Fix: Create server-specific handler if a custom handler has not been set (thanks Adhara3)

33.0.0

New: Reworked timezone conversion API (simply set TimeConversion and TimeZone)
New: Options to convert server timestamps into the format of your choice (ServerTime, LocalTime and UTC)
New: Support for conversion to local timezone in .NET core (set LocalTimeZone)
New: GetListing honors the time conversion settings of the active client
New: GetModifiedDate honors the time conversion settings of the active client
New: SetModifiedDate honors the time conversion settings of the active client
New: Reworked API for Custom file listing parsers (simply set ListingCustomParser on the client)
Fix: Drop support for legacy file listing parsing routines (FtpParser.Legacy will no longer work)
Fix: Unexpected time conversion occuring in GetModifiedTimeAsync
Change: Breaking changes to the TimeConversion property.
Change: Breaking changes to the TimeOffset property, which has been replaced by TimeZone

32.4.7

Fix: "The connection was terminated before a greeting could be read"

32.4.6

Platform: Add support for .NET Standard 2.1
Platform: Upgrade System.Net.Security from version 4.3.0 to 4.3.2 to fix security issues
Performance: Quickly abort detection if host is unavailable during AutoDetect/AutoConnect
Fix: UploadDirectory fails for some files with "Unable to read data from the transport connection" (thanks manuelxmarquez)
Fix: Comment for UploadFile/UploadFileAsync/DownloadFile/DownloadFileAsync methods
Fix: Stack overflow during connection when server responds incorrectly to PASS command

32.4.5

Fix: Uncatchable NullReferenceException is occasionally thrown from ConnectAsync

32.4.4

New: Automatic FTPS connection mode: FtpEncryptionMode.Auto which connects in FTP and attempts to upgrade to FTPS
New: IsEncrypted property to check if FTPS encryption is currently active for this connection
Fix: ValidateCertificateRevocation property was not being honored in async version (thanks kolorotur)

32.4.3

Fix: Ensure file is retried sucessfully when first upload/download fails with an IOException (thanks manuelxmarquez)
Fix: Ensure file streams read and write correctly even when no FtpClient is provided (thanks manuelxmarquez)
Fix: Clear custom parser when removing parser or clearing all parsers (thanks rubenhuisman)

32.4.1

New: LocalFileBufferSize property to control size of file buffer during local file I/O

32.4.0

New: UploadDirectoryDeleteExcluded property to control if excluded files are deleted during Upload (thanks philippjenni)
New: DownloadDirectoryDeleteExcluded property to control if excluded files are deleted during Download (thanks philippjenni)
Fix: Dispose AsyncWaitHandles to stop handle leak in .NET Framework 4.5 (thanks sdiaman1)
Fix: Implement proper cancellation support in UploadDirectory (once file transfer begins it cannot be cancelled)
Fix: Implement proper cancellation support in DownloadDirectory (once file transfer begins it cannot be cancelled)
Fix: Implement proper cancellation support in FXP TransferDirectory
Fix: Implement proper cancellation support in recursive GetListing
Fix: Correctly resume when unexpectedEOF error received during uploading a file (thanks mrcopperbeard)
Fix: Hide internal properties in FtpClient that are not meant to be exposed
Fix: Update IFtpClient with the latest set of public properties that are meant to be exposed

32.3.3

Fix: Downloading or uploading a directory can generate incorrect local paths

32.3.2

Fix: Downloading or uploading a directory can generate incorrect local paths
Fix: Expose LoadProfile API so it can be called by the generated code from AutoDetect

32.3.1

New: ListingDataType property to get file listings in ASCII/Binary
New: DownloadZeroByteFiles property to control if zero-byte files should be downloaded or skipped
Fix: Downloading 0-byte files crashes since no data downloaded

32.3.0

New: All server-specific handlers moved to dedicated classes that extend FtpBaseServer
New: Ability to handle custom non-standard FTP servers by extending FtpBaseServer
Fix: Only overwrite local file after the first bytes downloaded of a remote file

32.2.2

New: Tracking progress with FXP transfers is supported for all transfer modes
New: Track low-level progress with new TransferredBytes in FtpProgress class (thanks Adhara3)
New: FXPProgressInterval property to control how often FXP progress reports are sent
Fix: Hide TransferFileFXPInternal because its an internal transfer method and not to be used directly

32.2.1

Fix: FtpFileExtensionRule was failing to compare extensions unless they were prefixed with a dot

32.2.0

New: GetChecksum allows you to specify a hash algorithm to be run on the server if supported
New: GetChecksum has special support for switching the server-side algorithm for HASH command support
New: FXP file transfer now validates the file using the first mutually supported algorithm

32.1.1

Fix: Incorrectly formatted string returned by utility method TransferSpeedToString

32.1.0

New: CompareFile and CompareFileAsync methods to quickly perform various equality checks on a uploaded/downloaded file

32.0.0

Fix: When download fails and we need to retry on failed verification, ensure that file is re-downloaded
Fix: When FXP transfer fails and we need to retry on failed verification, ensure that file is re-transfered
Fix: When uploaded file is skipped, FtpStatus.Failed is returned instead of FtpStatus.Skipped
Fix: Properly handle 4xx and 5xx series of errors and indicate failure when uploading or downloading files
Fix: Correctly detect if server-side recursion is supported otherwise fallback to manual directory recursion
Fix: Only resume download of files if Append mode is selected (in Overwrite mode we restart the download)
Change: Upload and UploadAsync now returns FtpStatus to indicate skipped, success or failed

31.3.2

Fix: Proper session handling for FXP connections and disconnection of cloned connections
Performance: Reduce redundant file size check in DownloadFile when appending is used

31.3.1

New: AutoDetect and AutoConnect now auto-configure for Azure FTP servers using known connection settings
Improve code generation of FtpProfile to use LoadProfile rather than setting each property individually
Add advanced Timeout and Socket settings to FtpProfile for Azure auto configuration
Fix: All exception classes now inherit from FtpException
All exceptions and FtpProfile are now serializable in .NET Framework

31.3.0

New: TransferFile and TransferDirectory methods to transfer files from server to server (thanks n0ix)
New: FXP (File Transfer Protocol) implementation to support direct server-to-server transfers (thanks n0ix)

31.2.0

New: Predefined rules for filtering on file name using regular expressions (thanks n0ix)
New: Predefined rules for filtering on folder name using regular expressions (thanks n0ix)
Fix: Don't calculate ETA and percentage of FtpProgress if file size is zero (thanks Adhara3)
Fix: GetFilePermissions should use GetObjectInfo instead of GetListing to prevent incorrect filepaths

31.1.0

New: Support for MMD5 file hashing command to validate downloaded/uploaded files. (thanks n0ix)
Change: Disable all Begin* and End* methods for .NET 4.5 and onwards as async/await is supported.
Improve: GetHashAlgorithmAsync and SetHashAlgorithmAsync implemented as true async methods with cancellation support
Improve: GetObjectInfoAsync implemented as true async methods with cancellation support

31.0.0

New: Download and upload file methods indicate if file was transferred, skipped or failed to transfer
New: C# and VB.NET Examples for all file and folder transfer methods
New: VB.NET Examples for all methods (not included in Nuget package but available on Github)
Change: DownloadFile and UploadFile return FtpStatus instead of boolean flag for tri-state feedback

30.2.0

New: Support for XCRC FTP Command and CRC32 hash support to validate downloaded/uploaded files (thanks n0ix)

30.1.1

Fix: Calculation of local file path during DownloadFolder sometimes ignores base directory

30.1.0

New: Support multi-file progress tracking by indicating file index and local & remote path of the file
New: UploadDirectory and DownloadDirectory now supports tracking progress of the entire task
New: UploadFiles and DownloadFiles now supports tracking progress for both sync/async methods
Fix: Update IFtpClient interface by adding new UploadDirectory and DownloadDirectory methods
Fix: Correctly determine file exists on servers that don't support SIZE command and return error 550
Fix: Support more strings to determine if file exists using SIZE command

30.0.0

New: UploadDirectory and UploadDirectoryAsync methods to recursively upload or mirror a directory
New: DownloadDirectory and DownloadDirectoryAsync methods to recursively download or mirror a directory
New: Rule engine to filter files that should be uploaded/downloaded according to multiple user-defined rules
New: Predefined rules for filtering on folder name, useful for blacklisting certain system folders
New: Predefined rules for filtering on file name or file extensions, useful for transferring a subset of files
New: Predefined rules for filtering on file size, useful for filtering out very large files
New: Ability to determine parent/self/child directories in listing using SubType property of FtpListItem
Fix: Machine listings sometimes cause infinite recursion in GetListing when recursing into self directory
Change: CreateDirectory and CreateDirectoryAsync now return a flag indicating if it was created or skipped
Change: Use public fields instead of public properties for FtpListItem
Change: Improve performance of CreateDirectory by skipping the directory exists check

29.0.4

Fix: Detect "file size not allowed in ASCII" string for French FTP servers

29.0.3

Fix: TimeoutException when trying to read FTP server reply after Download/Upload

29.0.2

New: Add SendHost and SendHostDomain to control if HOST command is sent after handshake (thanks dansharpe83)

29.0.1

Fix: Read stale NOOP responses after file transfer and also after 226 Transfer complete (thanks aliquid)
Fix: Correct default value for TimeConversion property to assume UTC timestamps

29.0.0

New: Support .NET Standard 2.0
New: Keep control socket alive during long file transfers using NOOP (thanks aliquid)
New: Add NoopInterval property to control interval of NOOP commands (thanks aliquid)
New: Add TimeConversion property to control if timestamps are converted from UTC into local time
Refactor: Rename FtpExists to FtpRemoteExists to make its usage clear
New: Support detection of IBM z/OS and MVS FTP OS and server (allows for server specific commands)
New: New constructors for FtpClient to support hostnames in Uri format
Fix: Always send progress reports after file download, even for zero-length files

28.0.5

New: ValidateCertificateRevocation property to control if certificate revocation is checked.

28.0.4

New: ValidateAnyCertificate property to validate any received server certificate, useful for Powershell
Fix: Default SSL protocol used in .NET 4.5+ release is now TLS 1.2 (latest supported protocol)

28.0.3

New: Override the server-specific recursive LIST detection by setting RecursiveList
Fix typo in IP parsing regex that causes fallback to Host IP to fail (thanks Andy Whitfield)

28.0.2

Fix: Verification of the MD5 Hash when file name contains spaces (thanks Nimelo)

28.0.1

Fix: Safely absorb TimeoutException thrown after the file has fully uploaded/downloaded

28.0.0

New: Progress reporting for synchronous methods Upload, Download, UploadFile and DownloadFile are now sent via delegates
Fix: Correctly send progress for synchronous methods and retain IProgress for async methods

27.1.4

Fix: Correctly assume Unix file listing parser for SunOS & Solaris servers
Fix: Safely absorb TimeoutException thrown after the file has fully uploaded/downloaded

27.1.3

New: Support detection of Sun OS Solaris FTP OS and server (allows for server specific commands)
Fix: UploadFile fails when destination folder is empty on SunOS (550 error)

27.1.2

Fix: Unable to upload files to OpenVMS servers if path contains numeric characters
Fix: Assume FTP commands supported by OpenVMS HGFTP server if FEAT not supported
FiX: Improve detection of OpenVMS absolute paths
Fix: Connect & ConnectAsync throw ArgumentException when passing an incomplete FtpProfile

27.1.1

New: Auto-detect the correct FTP listing parser when SYST command fails (IIS, Azure, OpenVMS)
New: Assume FTP commands supported by OpenVMS HGFTP server
FiX: Support edge case for OpenVMS absolute paths (directive can be alpha-numeric)

27.1.0

New: Improved transfer rate throttling when using an upload/download speed limit (thanks wakabayashik)

27.0.3

New: Support detection of XLight FTP server software (allows for server specific commands)
New: Partial support for getting directory listing using STAT command (GetListing supports new FtpListOption.UseStat)
Fix: GetFileSize always returns 0 instead of correct file size (thanks RadiatorTwo)

27.0.2

Fix: FileExists and FileExistsAsync support switching to binary mode for servers that need it

27.0.1

Fix: Error using BlueCoat proxy to an FTP server on a port other than port 21
Fix: Error using UserAtHost proxy to an FTP server on a port other than port 21

27.0.0

New: Change Capability API to return a list instead of bitwise enum (to support more than 32 distinct capabilities)
New: Change custom parsers to take capabilities as a list instead of bitwise enum (to match client implementation)
New: Support detection of FTP2S3 gateway server software (allows for server specific commands)
New: Support detection of server-specific capabilities of Serv-U FTP Gateway
New: Support RMDA command to quickly and recursively delete a directory from Serv-U FTP Gateway

26.0.2

Fix: Improve performance of GetFileSize to only switch to Binary for servers that require it
Fix: Ensure data type (ASCII/Binary) is correctly set during GetFileSize for servers that require it
Fix: Ensure data type (ASCII/Binary) is correctly set for cloned connections
Fix: Ensure data type (ASCII/Binary) is correctly set during GetListing and GetNameListing
Fix: Reset server detection state flags whenever we connect to a server, to allow for reuse of FtpClient
Fix: Copy server detection state flags to cloned connections to improve performance
Fix: Retry GetListing if temporary error "Received an unexpected EOF or 0 bytes from the transport stream"

26.0.1

Fix: Prefer using Passive/Active modes rather than Enhanced Active/Passive during auto-detection
Fix: Some FTP servers do not open a port when listing an empty folder with GetNameListing
Fix: Hard catch and suppress all exceptions during disposing to solve all random exceptions

26.0.0

New: Automatic FTP connection negotiation using AutoConnect()
New: Automatic detection of working FTP connection settings using AutoDetect()
New: C# code generation of working connection settings using FtpProfile.ToCode()
New: Support more capability detection commands: EPSV, CPSV, NOOP, CLNT, SSCN, SITE commands for ProFTPd
New: Improve transfer performance by only attempting EPSV once and then never using it again for that connection
New: Support MKDIR & RMDIR commands specially for ProFTPd to quickly create and delete a directory on the server-side
New: Support PRET command before downloading or uploading files for servers like ProFTPd & DrFTPd
New: Support detection of BFTPd server software (allows for server specific commands)
Fix: When uploading files in FtpExists.NoCheck mode, file size check should not be done
Fix: Some FTP servers do not open a port when listing an empty folder (thanks Mortens4444)
Fix: OpenRead with EnableThreadSafeDataConnections always transfers in ASCII (thanks ts678)
Refactor: Delete legacy static methods: OpenRead, OpenWrite, OpenAppend (dynamic versions still exist)
Refactor: Move CalcChmod from FtpClient to FtpExtensions (as part of repository cleanup task)

25.0.6

Fix: Async methods do not work with Active FTP mode and SSL/encryption (thanks Mortens4444)
Fix: For OpenVMS absolute paths may not contain slashes but are still absolute (3rd revision)

25.0.5

Fix: Divide-by-zero exceptions while calculating progress of file uploads/downloads

25.0.4

Fix: Supress all exceptions when Disposing the underlying FtpSocketStream

25.0.3

Fix: Received an unexpected EOF or 0 bytes from the transport stream (thanks mikemeinz)
Fix: UploadFile() progress callback is not called if the file already exists on the server
(.NET core) Fix: Connect() method sometimes causes the thread to hang indefinitely (thanks radiy)
Fix: Regression of #288 where upload hangs with only a few bytes left (thanks cw-andrews)

25.0.1

New: FtpAuthenticationException for authentication errors (thanks erik-wramner)
New: Added support to detect Homegate FTP Server

25.0.0

New: SSL Buffering is now switchable via the SslBuffering parameter
Fix: SSL Buffering is automatically disabled when using FTP proxies, and enabled in all other cases
Fix: Revert PR #383 as it was causing regression issues in SSL connectivity
Fix: Disable automatic IP correction to fix connectivity issues via BlueCoat proxy servers (thanks CMIGIT)
Refactor: Rename FtpClientUserAtHostProxyBlueCoat to FtpClientBlueCoatProxy
Fix: For OpenVMS absolute paths may not contain slashes but are still absolute (2nd revision) (thanks tonyhawe)
Fix: Detect file existence string "Can't find file" to fix FileExists check on some servers (thanks reureu)
Fix: Feature parity between FileExists and FileExistsAsync methods, added support for FtpReply 550 check (thanks reureu)
Fix: Feature parity between UploadFile and UploadFileAsync methods, added support for AppendNoCheck handling (thanks reureu)

24.0.0

New: Get detailed progress information for uploads/downloads via the FtpProgress object (thanks n0ix)
New: Get transfer speed and ETA (estimated time of arrival) for uploads/downloads (thanks n0ix)
Fix: Files were uploaded in Write mode instead of Append mode when the exists mode is AppendNoCheck and we couldn't read the offset position (thanks @everbalovas)
Fix: Swap SslStream and BufferedStream so proxied connections with FtpClientHttp11Proxy are to connect (thanks @rmja)

23.1.0

New: Additional FTP Server software detection (HP NonStop/Tandem, GlobalScape EFT, Serv-U, Cerberus, CrushFTP, glFTPd)
New: Assume capabilities for servers that don't support FEAT (wuFTPd)
Fix: FileExists returns false if name listing is used and server lists filenames with the path
Fix: For OpenVMS absolute paths may not contain slashes but are still absolute
Fix: For Download() methods restartPosition should not be mandatory

23.0.0

New: Ability to cancel all async methods via CancellationToken (thanks WolfspiritM)
New: ReadTimeout is now honored by all async methods (thanks WolfspiritM)
New: FTP Server operating system detection (Windows, Unix, VMS, IBM/OS400)
(.NET core) Fix: GetListing blocking with no timeout (thanks WolfspiritM)
(.NET core) Fix async methods by not using the the async read function (thanks WolfspiritM)

22.0.0

New: Ability to resume a download via existsMode on DownloadFile() and DownloadFiles() (thanks n0ix)
New: Ability to turn off checking for server capabilities using FEAT command (thanks nhh-softwarehuset)
Fix: Add workaround if a server advertises a non-routeable IP in PASV Mode (thanks n0ix)
Fix: Recursive directory deletion tries to delete the same file twice (because GetListing is also recursive)

21.0.0

New: OnLogEvent callback to get logs in the context of indivivdual FtpClient connections
Fix: All logging is done in the context of an FtpClient and then passed to FtpTrace listeners
Signature for custom list parsers has changed, FtpClient argument added to the end

20.0.0

New: FTP Server software detection (PureFTPd, VsFTPd, ProFTPD, FileZilla, OpenVMS, WindowsCE, WuFTPd)
New: Detect if the FTP server supports recursive file listing (LIST -R) command using whitelist
New: GetListing will manually recurse through directories if FtpListOption.Recursive is set and server does not support recursion
New: Added LastReply property which returns the last FtpReply recieved from the server.
New: Added new upload option AppendNoCheck to append to a file on the server without checking if it exists (thanks @everbalovas)
Fix: During upload, respond to any error in 5xx series, not just 550 (thanks stengnath)
Fix: Various fixes to UploadFileAsync based on fixes already implemented in UploadFile

19.2.4

Fix: UploadFilesAsync with errorHandling deletes the entire directory instead of specific files
Fix: Server responds to EPSV with 425 "Data connection failed" but connects with PASV (thanks ejohnsonTKTNET)
Fix: Use proper async configuration for .NET Async methods (thanks ejohnsonTKTNET)
Fix: Improve implementation of upload and download resuming in Async methods (thanks ejohnsonTKTNET)

19.2.3

Fix: UploadFile() or UploadFiles() sometimes fails to create the remote directory if it doesn't exist
Fix: DownloadDataType Binary value ignored on ASCII-configured FTP servers
Performance improvement: Added BufferedStream between SslStream and NetworkStream (thanks stengnath)
Fix: When the FTP server sends 550, transfer is received but not confirmed (thanks stengnath)
Fix: Make Dispose method of FTPClient virtual (thanks @martinbu)
Fix: OpenPassiveDataStream/Async() uses the target FTP host instead of the configured proxy (thanks @rmja)
Fix: FileExists() for Xlight FTP Server (thanks @oldpepper)
Fix: FTPD "550 No files found" when folder exists but is empty, only in PASV mode (thanks stengnath)
Fix: Many unexpected EOF for remote file IOException on Android (thanks @jersiovic)
Fix: Race condition when BeginInvoke calls the callback before the IAsyncResult is added (thanks stengnath)

19.2.2

Fix: Prevent socket poll from hammering the server multiple times per second
Fix: Allow using absolute paths that include drive letters (Windows servers)
Performance improvement: Only change the FTP data type if different from required type
Performance improvement: Download all files in EOF mode and skip the file size check, unless download progress is required
Added all missing async versions of FTP methods to IFtpClient
System: Certain core FTP socket handling operations have been changed to improve reliability & performance.

19.1.4

Fix: Fix hang in TLS activation because no timeout is set on the underlying NetworkStream (thanks @iamjay)

19.1.3

Added async versions of FTP methods to IFtpClient (thanks @peterfortuin)
Fix: Fixes when ActivePorts is specified in active FTP mode (thanks @ToniMontana)
Fix: Throw OperationCanceledException instead of FtpException when cancellation is requested (thanks taoyouh)

19.1.2

Fix: Add support for checking if file exists on Serv-U FTP Server
Fix: Make IFtpClient inherit from IDisposable (thanks @repl-andrew-ovens)
(UWP) Fix: UWP does not allow File.Exists() to run in UI thread (thanks taoyouh)

19.1.1

Fix: When downloading files in ASCII mode, file length is unreliable therefore we read until EOF
Fix: When upload/download progress is indeterminate, send -1 instead of NaN or Infinity
Fix: NetStream was not assigned in FtpSocketStream for .NET Standard in active FTP mode (thanks @ralftar)
Fix: CurrentDataType was not set for ASCII transfers in DownloadFileAsync/UploadFileAsync (thanks taoyouh)
Fix: Sometimes FtpSocketStream and FtpDataStream are not disposed in FtpSocketStream.Dispose (thanks taoyouh)

19.1.0

New Progress reporting for UploadFile & DownloadFile methods via IProgress
Fix: Stream.Position should not be set in UploadFileInternal unless supported

19.0.0

New Task-based async methods for .NET Standard and .NET Fx 4.5 (thanks taoyouh)
New async methods for UploadFile, DownloadFile, UploadFiles & DownloadFiles (thanks artiomchi)
(UWP) Fix: FileNotFoundException with reference System.Console (thanks artiomchi)
(.NET core) Fix: Thread suspends when calling UploadFile or DownloadFile (thanks artiomchi)
(.NET core) Fix: File download hangs inconsistently when reading data from stream (thanks @artiomchi, bgroenks96)
(.NET core) Fix: Stream does not dispose due to wrong handling of closing/disposing (thanks artiomchi)
Fix: File upload EOS bug when calling Stream.Read (thanks bgroenks96, @artiomchi, @taoyouh)
Fix: DownloadFileInternal not recognizing the download data type with EnableThreadSafeConnections (thanks bgroenks96)
(Backend) Migrate to a single VS 2017 solution for all frameworks (thanks artiomchi)
(Backend) Continuous Integration using AppVeyor (thanks artiomchi)

18.0.1

Add IFtpClient interface to build unit tests upon main FtpClient class (thanks Kris0)
Disposing FtpDataStream reads server reply and closes the underlying stream (thanks Lukazoid)

18.0.0

New SetModifiedTime API to change modified date of a server file in local timezone/UTC
Add type argument to GetModifiedTime, allowing for getting dates in UTC/Local timezone
Breaking changes to Async API of GetModifiedTime (addition of type argument)
GetModifiedTime and SetModifiedTime now honor the TimeOffset property in FtpClient
Add checkIfFileExists to OpenRead, OpenAppend and OpenWrite to skip GetFileSize check
Fix issue where InnerException is null during a file transfer (upload/download)
Improve performance of typical uploads/downloads by skipping the extra file exists check

17.6.1

Fix for CreateDirectory and DirectoryExists to allow null/blank input path values
Fix for GetFtpDirectoryName to return correct parent folder of simple folder paths (thanks ww898)

17.6.0

Add argument validation for missing/blank arguments in : Upload, Download, UploadFile(s), DownloadFile(s), GetObjectInfo, DeleteFile, DeleteDirectory, FileExists, DirectoryExists, CreateDirectory, Rename, MoveFile, MoveDirectory, SetFilePermissions, Chmod, GetFilePermissions, GetChmod, GetFileSize, GetModifiedTime, VerifyTransfer, OpenRead, OpenWrite, OpenAppend
Disable all async methods on .NET core due to persistant PlatformUnsupported exception (if you need async you are free to contribute a non-blocking version of the methods)

17.5.9

Increase performance of GetListing by reading multiple lines at once (BulkListing property, thanks sierrodc)

17.5.8

Add support for parsing AS400 listings inside a file (5 fields) (thanks rharrisxtheta)
Retry interpreting file listings after encountered invalid date format (thanks rharrisxtheta)
Always switch into binary mode when running SIZE command (thanks rharrisxtheta)

17.5.7

Honor UploadDataType and DownloadDataType in all sync/async cases (thanks rharrisxtheta)
Force file transfers in BINARY mode for known 0 byte files (thanks rharrisxtheta)
Allow file transfers in ASCII mode if the server doesn't support the SIZE command (thanks rharrisxtheta)

17.5.6

Fix NullReferenceException when arguments are null during FtpTrace.WriteFunc

17.5.5

Remove internal locking for .NET Standard 1.4 version since unsupported on UWP

17.5.4

Remove dependency on System.Threading.Thread for .NET Standard 1.4 version (for UWP)

17.5.3

Allow transferring files in ASCII/Binary mode with the high-level API (UploadDataType, DownloadDataType)

17.5.2

Add support for .NET 3.5 and .NET Standard 1.4 (supports Universal Windows Platform 10.0)

17.5.1

Add FtpTrace.LogToConsole and LogToFile to control logging in .NET core version

17.5.0

Add PlainTextEncryption API to support FTPS servers and plain-text FTP firewalls (CCC command)
FluentFTP now uses unsafe code to support the CCC command (inside FtpSslStream)
If you need a "non unsafe" version of the library please add an issue

17.4.4

Add logging for high-level function calls to improve remote debugging (FtpTrace.LogFunctions)
Add settings to hide sensitive data from logs (FtpTrace.LogIP, LogUserName, LogPassword)
Add RecursiveList to control if recursive listing should be used
Auto-detect Windows CE and disable recursive listing during DeleteDirectory()

17.4.2

Add UploadRateLimit and DownloadRateLimit to control the speed of data transfer (thanks Danie-Brink)

17.4.1

Fix parsing of LinkTarget during GetListing() on Unix FTP servers
Improve logging clarity by removing "FluentFTP" prefix in TraceSource

17.4.0

Add MoveFile() and MoveDirectory() to move files and directories safely

17.3.0

Automatically verify checksum of a file after upload/download (thanks jblacker)
Configurable error handling (abort/throw/ignore) for file transfers (thanks jblacker)
Multiple log levels for tracing/logging debug output in FtpTrace (thanks jblacker)

17.2.0

Simplify DeleteDirectory() API - the force and fastMode args are no longer required
DeleteDirectory() is faster since it uses one recursive file listing instead of many
Remove .NET Standard 1.4 to improve nuget update reliability, since we need 1.6 anyway

17.1.0

Split stream API into Upload()/UploadFile() and Download()/DownloadFile()

17.0.0

Greatly improve performance of FileExists() and GetNameListing()
Add new OS-specific directory listing parsers to GetListing() and GetObjectInfo()
Support GetObjectInfo() even if machine listings are not supported by the server
Add existsMode to UploadFile() and UploadFiles() allowing for skip/overwrite and append
Remove all usages of string.Format to fix reliability issues caused with UTF filenames
Fix issue of broken files when uploading/downloading through a proxy (thanks Zoltan666)
GetReply() is now public so users of OpenRead/OpenAppend/OpenWrite can call it after

16.5.0

Add async/await support to all methods for .NET 4.5 and onwards (thanks jblacker)

16.4.0

Support for .NET Standard 1.4 added.

16.2.5

Add UploadFiles() and DownloadFiles() which is faster than single file transfers
Allow disabling UTF mode using DisableUTF8 API

16.2.4

First .NET Core release (DNXCore5.0) using Visual Studio 2017 project and shared codebase.
Support for .NET 2.0 also added with shims for LINQ commands needed.

16.2.1

Add FtpListOption.IncludeSelfAndParent to GetListing

16.1.0

Use streams during upload/download of files to improve performance with large files

16.0.18

Support for uploading/downloading to Streams and byte[] with UploadFile() and DownloadFile()

16.0.17

Added high-level UploadFile() and DownloadFile() API. Fixed some race conditions.

16.0.14

Added support for FTP proxies using HTTP 1.1 and User@Host modes. (thanks L3Z4)

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